"The Beast" (A Fera) the new Ouro Negro (Black Gold) soundmachine being built in the suburbs of Belém do Pará. For the past fourty years, even before the becoming of Tecnobrega, João do Som si the main craftsman and creator of machines adulated in the "Aparelhagem" (equipements or machines) parties in Belém. He first creates a project and its design using the Corel Draw software, before building a prototype to obtain clients´approval.